Many over counter cold meds are safe for baby, but antihistamines have been found to affect breastmilk supply in some woman so take to caution to any meds you take for your cold. If possible, try home remedies such as vapor machine for stuffy or blocked nasal passages, cough drops instead of cough syrup, etc.. check out thus site for more info... www.parentingstartshere.com/index.p...